Hong Kong - 1 new outbreak of highly pathogenic avian influenza H5N6 in red-whiskered bulbul, Kowloon City (OIE, April 12, 2017)

[Pathfinder]

Highly pathogenic influenza A viruses (infection with) (non-poultry including wild birds), Hong Kong (SAR - PRC)

Information received on 12/04/2017 from Dr Thomas Sit, Chief Veterinary Officer / Assistant Director (Inspection & Quarantine), Agriculture, Fisheries and Conservation Department, Hong Kong Special Administrative Region Government, Hong Kong , Hong Kong (SAR - PRC)

Summary Report type Immediate notification Date of start of the event 07/04/2017 Date of confirmation of the event 12/04/2017 Report date 12/04/2017 Date submitted to OIE 12/04/2017 Reason for notification Recurrence of a listed disease Date of previous occurrence 30/11/2016 Manifestation of disease Clinical disease Causal agent Highly pathogenic influenza A virus Serotype H5N6 Nature of diagnosis Laboratory (advanced) This event pertains to the whole country

New outbreaks (1)

Outbreak 1 Argyle Street Playground, Kowloon City, HONG KONG Date of start of the outbreak 07/04/2017 Outbreak status Resolved (07/04/2017) Epidemiological unit Not applicable Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Red-whiskered Bulbul:Pycnonotus jocosus(Pycnonotidae) 1 1 Affected population A dead red-whiskered bulbul was collected on 7th April 2017 at Argyle Street Playground, Argyle Street, Kowloon. The species is an abundant resident in Hong Kong.

Summary of outbreaks Total outbreaks: 1 Total animals affected Species Susceptible Cases Deaths Destroyed Slaughtered Red-whiskered Bulbul:Pycnonotus jocosus(Pycnonotidae) 1 1 Outbreak statistics Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost* Red-whiskered Bulbul:Pycnonotus jocosus(Pycnonotidae) ** ** 100.00% ** *Removed from the susceptible population through death, destruction and/or slaughter **Not calculated because of missing information

Epidemiology Source of the outbreak(s) or origin of infection Unknown or inconclusive Epidemiological comments An intensive surveillance system is in place for all poultry farms, poultry markets, and pet bird shops in Hong Kong. The H5N6 infected wild bird was detected in our ongoing surveillance program on wild birds. No spread of disease was evident. There are no poultry farms located within three kilometres of where the bird was found. The Hong Kong Wetland Park and Mai Po Nature Reserve are not located within three kilometres of where the bird was found.The date of end of the outbreak is the same as the date the bird was found (7 April 2017).

Control measures Measures applied Screening Disinfection / Disinfestation Vaccination permitted (if a vaccine exists) No treatment of affected animals Measures to be applied No other measures

Diagnostic test results Laboratory name and type Species Test Test date Result Tai Lung Veterinary Laboratory, Agriculture, Fisheries & Conservation Department (National laboratory) Red-whiskered Bulbul immunohistochemical test 10/04/2017 Positive Tai Lung Veterinary Laboratory, Agriculture, Fisheries & Conservation Department (National laboratory) Red-whiskered Bulbul real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 10/04/2017 Positive Tai Lung Veterinary Laboratory, Agriculture, Fisheries & Conservation Department (National laboratory) Red-whiskered Bulbul virus isolation 12/04/2017 Positive Centre of Influenza Research, School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong (Regional Reference Laboratory) Red-whiskered Bulbul gene sequencing Pending

Future Reporting The event is continuing. Weekly follow-up reports will be submitted.

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http://www.oie.int/wahis_2/public/wahid.php/Reviewreport/Review?page_refer=MapFullEventReport&reportid=23529

[Miyamoto Masakazu]

Government of Hongkong is also reporting this case:

http://www.info.gov.hk/gia/general/201704/12/P2017041200953.htm?fontSize=1